Good Stuff

Heres a couple addons that i think are almost a necessity.

Gear Score,,,you need to know yours but also other peoples,,,,this doesnt mean that the higher gs the better the player,, it just means that the gear is good enough for whichever instance you are going to..

http://wow.curse.com/downloads/wow-addons/details/gearscore.aspx

Another that i find very helpful is --Deadly Boss Mods-- this will tell you what action to take and when to take it.

http://wow.curse.com/downloads/wow-addons/details/deadly-boss-mods.aspx

helps the new player's and more kill boss's and or not die

Ive noticed lately some DPS'ers DPS is for shit. Whats the point in 5K+gear score if your DPS is around 1.2k

Know your DPS, you may need to respec.

here is link for Recount, notice under download link theres a link for an older version.

http://wow.curse.com/downloads/wow-addons/details/recount.aspx

If you are dps with good gear and your having low dps find a good build on google for WOTLK and respec.

i know a supper healing spec one way beater then google so and a dps spec for druid and priest